diff --git a/build/jam/BuildSetup b/build/jam/BuildSetup
index ed193ebd3c..9a5a92e934 100644
--- a/build/jam/BuildSetup
+++ b/build/jam/BuildSetup
@@ -1041,3 +1041,4 @@ EnableWerror src kits interface ;
 EnableWerror src kits storage ;
 EnableWerror src kits support ;
 EnableWerror src system kernel ;
+EnableWerror src add-ons kernel file_systems bfs ;